Table 2.

Photosynthetic Parameters under Well-Watered and Dehydrated Conditions

Parameters	Wild type	UGTOE3-10	UGTOE13-8
Well watered
ETRmax	94.90 ± 0.06	114.10 ± 0.06	108.80 ± 0.12
ΦPSIImax	0.817 ± 0.003	0.810 ± 0.002	0.812 ± 0.002
qP	0.48 ± 0.02	0.45 ± 0.03	0.50 ± 0.01
Dehydration
ETRmax	17.7 ± 1.5	33.1 ± 3.4	31.3 ± 3.5
ΦPSIImax	0.69 ± 0.01	0.74 ± 0.01	0.72 ± 0.01
qP	0.28 ± 0.03	0.46 ± 0 .02	0.43 ± 0.03

Photosynthesis was measured at 500 μmol m⁻² s⁻¹ as described in Methods. Well-watered wild-type and transgenic plants were grown in soil for 51 d under short-day conditions. Data are means ± se (n = 3). Dehydration treatments were applied for 1.5 h on detached fully expanded leaves from 1-month-old plants growing under long-day regime. Statistically significant differences are indicated in bold (n = 10, P < 0.05). ETRmax, maximal electron transfer rate; ΦPSIImax, maximal photochemical yield of photosystem II; qP, photochemical quenching.